Incandescent lamp



D 9, 1941. R. s. BAEZ 2,265,886

INCANDESCENT LAMP Filed Feb. 2'7, 194].

lNVENT QR. Rafael EEPr-aflm Baez QZZW W ATTORN EYS.

Patented Dec. 9, 1941 UNITED STATES PATENT OFFICE INGAN'DESCENT LAMPRafael Serrano Baez, Santurce, P. B. Application February 27, 1941,Serial No. 380,937

4 Claims.

This invention relates to improvements in electric incandescent lamps.

The primary object of this invention is the provision of an efficientincandescent lamp adapted to utilize argon gas in such manner that thetransfer of heat to the external portions of the lamp will be reduced toa minimum.

A further object of this invention is the provision of an electricincandescent lamp which will provide great illumination in a mannerwhich is more economical than the modern phosphores cent mercury lamp.

Further objects of this invention will be apparent during the course ofthe following detailed description.

In the accompanying drawing, forming a part of this specification andwherein similar reference characters designate corresponding partsthruout the several views,

Figure 1 is a vertical cross sectional view taken thru the improvedlamp.

Figure 2 is a transverse sectional view taken substantially on the line2--2 of Figure 1.

In the drawing, wherein for the purpose of illustration is shown only apreferred embodiment of the invention, the letter A may generallydesignate the improved electric incandescent lamp which may include aconventional base plug Ill having mounted therein, in usual manner, anordinary fused glass stem ll terminating at its lower end in a smallcircular glass bulb or envelope 12, the space I3 of which is preferablyfilled with argon gas. The stem ll within the compartment [3 is providedwith a slight projection Hi. The stem II is provided with wires l5therethru, connected in usual manner to the plug l0 and contact I! atthe base of the bulb and terminating within the compartment l3 of thesmall bulb I'2 in a filament 20, which may be of alloy tungsten ornickel, or any other approved filament material.

At the extreme end of the projection ll of the glass tube ll, within thecompartment l3, there is disposed a fiat insulation disc 25, preferablyof mica or any other approved non-heat conductive material. The edgespreferably terminate against the inner surface of the bulb l2 toentirely seal off the compartment l3 from the glass tube II; the discbeing provided with apertures just sufilciently large to permit thewires of the filament to extend therethru. It is thus noted that anannular heat insulating space is also provided above the disc 25 andwithin the inner bulb l2.

The lamp A furthermore includes an outer bulb or heat conserving jacket35 which is connected in usual manner with the base In of the lamp andextends therefrom in spaced relation surrounding the glass tube Ii andthe bulb l2. The compartment 36 between the inner surface of this jacketor bulb portion 35 and the inner bulb l2 and glass stem ll provides apartial vacuum.

Changes in details may be made to the shape, size and arrangement ofparts without departing from the spirit of the invention or the scope ofthe following claims.

I claim:

1. An incandescent lamp comprising a base, a sealed inner bulbcontaining a gas such as argon gas, filament means for the lamp disposedwithin the inner bulb, an outer bulb surrounding said inner bulb andsecured to said base in spaced relation therewith, the space between theinner and outer bulbs forming a partial vacuum, and an insulator in theinner bulb at the base of the filament to prevent undue transfer of heatto the base of the lamp.

2. An incandescent lamp comprising a base, an insulation stem connectedwith the base and extending therefrom, a bulb at the end of the basehaving the compartment therein filled with a gas such as argon gas,conducting wires extending from the base thru said stem and terminat ingin a filament in said compartment of the bulb, an insulator connected atthe end of the stem within the compartment of said bulb between thefilament and said stem to prevent undue transfer of heat thru said stemto the base, and an outer jacket connected with said base in spacedrelation with the stem and bulb first mentioned and having a partialvacuum therein.

3. An incandescent lamp comprising a base having a glass stem extendingtherefrom, a small bulb at the end of the glass stem connected therewithand defining a compartment filled with argon gas, wires extending thruthe stem in properly connected relation with the base and terminating inthe bulb in a filament, a fiat insulation disc connected with the stemat its terminal in the bulb and marginally abutting the inner surface ofthe bulb to prevent undue transfer of .heat from the bulb thru said stemto the base, and an outer bulb connected with the base and surroundingthe stem and inner bulb.

4. An incandescent lamp comprising a base, an elongated stem ofinsulation material connected with the base, a bulb at the end of thebase having a gas filled compartment therein, conducting wires extendingthrough the stem and ter- 2 2,aos,ase

minatin: in a filament in said bulb. an outer to said filament, saidinsulation disc havinrita bulb connected with the base and extendina inperipheral margin abutting the interior oi said spaced relation withrespect to the stem and inner bulb and defining an annular space m innerbulb, the space being partially evacuated, in the inner bulb andseparated irom the filaand an insulation disc secured at the extreme 5ment space therein.

bottom of said stem within the inner bulb havin: the wires aforesaidextending therethrough RAFAEL smRANO BAEZ.

